How do you pass the third level?
Hi! First of all, congrats for reaching the last level.
I am not sure where you are stucked, so I give you a schema to complete it. (Collect all coins is a must)
Start at door -> Walk left to reach the bottom part of the plartform. -> Run and let you fall to use your both jumps in air to reach the tiny platfom -> Jump over next platform and open the chest -> climb the new appered platforms (They are X seconds on, and Y seconds off) to the static tiny platform above -> Run and both jumps in air to reach the next chest -> Same jumps to reach next static -> Cross over other 4 on/off per time platforms -> Open chest -> Jump over the new platforms to reach the next chest (These will "insta" become off when you jump over them, and return On after 1 second) -> Rejump the path till end door.
Maybe too much text for so a small level, but let me know if you play again and you are able to complete it. And if not, dont be frustated, all people I asked for to try this game couldn't complete level 1.